Use direct paths instead of activating venvs

python-setuptools-rust.spec

@@ -105,10 +105,8 @@ for example in $(ls examples/ | grep -vE %{integration_tests_exc}); do
     %{python3} -c 'from setuptools.build_meta import build_wheel; build_wheel("dist")'
     if [ -d "tests/" ]; then
         %{python3} -m venv venv --system-site-packages
-        . ./venv/bin/activate
-        pip install dist/*.whl
-        python -Pm pytest tests/
-        deactivate
+        ./venv/bin/pip install dist/*.whl
+        ./venv/bin/python -Pm pytest tests/
     fi
     cd -
 done